2019 Volkswagen Tiguan electrical system problems

“Driving totally fine and my car makes a loud noise, tells me to check starter system and pull over. ALL electronics shut off and engine continues to run. Speedometer, gas gauge, radio screen, lights, turn signals, hazards, brake lights, EVERYTHING electronic shuts off. Starter was checked, battery was checked, alternator was checked, everything is fine. This is a VW issue as MANY 2019 Tiguans have been experiencing this exact issue this year. This is NOT safe!”

“On unusually hot days, my VW Tiguan 2019, pops up a Check Start system and shuts down the dash and all electrical components (speedometer, A/C, infotainment system, blindside monitors, brake lights etc.) Car still runs but everything does not work. On searching, there are other VW users complaining about this issue as well making it a known manufacturer defect/issue. I called my local VW dealer letting them know that this is a safety issue and to find out if there is currently a recall for this issue but was told there is none. As this is a massively known safety issue. I think the NTHSA must mandate Volkswagen to do a complete recall for all VW vehicles they know are affected by this issue on their own budget without having consumers have to pay for this repair. Thank you.”

“During Hot weather the vehicles electrical will shut down while driving displaying a message saying check starter system and I will loose all lighting and brake lights and turn signals and HVAC systems and engine will shut off also I was going down the highway when this happened to me and it only happens in hot weather. This has been happening since we purchased the vehicle Volkswagen refuses to fix it and the 2020 models are on recall for this same issues.”

“When driving car will read error code that states there is problem with the starter and shuts off all electric components while engine is still running. Has happened multiple times since initial incident.”

“While driving my car, I get a loud beep and all of a sudden it says system switch failure pull over safely. It seems to do this on hot days. We thought it was maybe the battery and replaced that at $280. It was fine for about a week and then started doing it again. Everything on my dashboard goes completely blank my AC stops working I cannot see my gauges. Nothing works. It’s very scary especially when you’re driving. You can’t see your speed. Even the manual speed goes out my gas meter doesn’t work. None of the meters work. I just bought this car six months ago. This is absolutely insane and after looking up what is going on with my car this seems to be a very common occurrence which would make me wonder if the ignition switches need to be replaced or the 645 relay is faulty, but it’s not adding up something absolutely needs to be done. It’s an unsafe occurrence that could potentially kill someone while they’re driving.”

“The car stopped at a light on a busy street in [XXX] (in the middle lane), then the engine stopped, and my wife could not restart it. I went as fast as possible and met her. I was eventually able to get it started. This is the third time we have had problems like this. I did the same thing for me and another time for my wife. I believe it is the stop-start capability, but I can't say for sure. We have also had bad engine oil burning problems and electrical problems. All of these (I now know, but did not before) are recurring problems for 2019 Tiguans. The cylinder head was rebuilt last year, associated with a similar instance. I am now fully aware that the 2019 Tiguans are known to experience all of these problems, but when I brought my car in on previous occasions, that never got mentioned. I am told XYZ is an issue, then billed for repairs. The car was originally leased, and when I purchased it at the end of the lease, I also purchased a full premium warranty. When the issue happened in May of 2025, the policy eventually covered this, but it took over a month of justifications and records before the third-party insurance company agreed to cover the repairs.…”